Sectional boiler



(No Model.)

J. HOPSON, J12, &.L. S. DANIELS.

SEGTIONAL BOILER.

.449. Pateinted i. 1, 1887 UNITED STATES PATENT OFFICE.

JOHN HOPSON, JR, AND LEWIS S. DANIELS, OF NEW LONDON, CONNECTICUT.

SECTIONAL BOILER.

SPECIFICATION forming part of Letters Patent No. 358,449, dated IJarch 1, 1887.

I Application filed May 12, 1836. Serial No. 202,0i0. (No model.)

To all whom it may concern.-

Be it known that we, JOHN HOPSON, J r., and LEwIs S. DANIELS, citizens of the United States, and residents of New London, in the county of New London and State of Connecticut, have jointly invented certain new and useful Improvements in Cast-Iron Sectional Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Our invention relates to that class of boilers in which the vertical sections are so constructed and arranged as to take upon their exterior and around the fire-box a general circular or oval form, the inner surfaces above thefirebox affording space to admit a self-feeding coal-magazine, and leaving passages for the escape of products of combustion, and each section connected at top and bottom with circulating pipes, or headers. V

The objects of our invention are, first, to so construct and arrange the various sections and their connections that they may freely expand and contract; second, to locatethelower header below the point of support for the various sections; third, to support the lower header by connections with the supported sections and the grate upon the lower header; and, fourth, to provide simple and efficient means for holding the packing between the boiler-sections. To accomplish these objects our improvements involve certain new and useful peculiarities of construction, relative arrangements or combinations of parts, and principles of operation, all of which will be herein first fully described, and then pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a vertical section and elevation of a boiler embodying our improvements, the exterior shell or casing, smoke-pipe, andbase or ash-pit section being omitted as being unnecessary for purposes of the present description. Fig. 2 is a view in horizontal section, the part to the right indicatingthe form of the boiler-sections at the region of the fire-box and the part to the left showing the projections above the fire-box. Fig. 3 is a plan view of the lower header detached from the other parts, showing the lugs for receiving the arms upon the grate-ring.

In all these figures like letters of reference,

wherever they occur, indicate corresponding parts.

A is the top header, with which the various boiler-sections are connected; B, the self feeding coalmagazine, and C C C the hollow boiler-sections.

D D are the packingstrips; E, the packingstrip lock; F, the catch formed on the outer surface of the sections; G, dovetails or lugs formed on the lower header to receive the arms of the grate-ring; H, the lower header; I, the boiler supporting ring, and J the grate-ring.

The top header, A, is used to connect the several boiler-sections at top and hold them firmly and properly in place, and constitutes the top of the boiler, its central open part admitting the self feeding coal-magazine B, which is sustained upon the header. The space between this header and the boiler-sections, accommodating the nipples a a, used to make the necessary connections, forms a passage for the escape of the products of combustion.

The boilersections shown at C surround the fire-box and are varied in form, as shown at C, to fit above the fire-door, and at C to fit below it. Above the fire-box the sections project over it, as shown at the left of Fig. 2. While the sections, when assembled, are intended to form a closed interior, the joints between them will not ordinarily be close enough to be gas-tight; and in order to make them gas-tight they areluted with suitable material, and the packing-strip D is used to cover the joint and retain the luting, and this strip is partly contained within a groove formed along each outer edge of each boiler-section, as in dicated in Fig. 2. This packingstrip is held in place by the packing-strip lock E, the latter secured to the boiler within the catch formed on the outer surface of the boiler-sections, as

shown at F.

The boiler-header H is used to establish connection between the several boiler-sections at bottom and to hold them in proper relative positions at that point, the connections'being made by nipples, as at b, and itis also used to support the grate. On its interior are the dovetails or lugs G to receive the depending arms 0, which are connected with the grate-ring J.

The boiler is supported upon a plate-ring, I, made in one or more pieces and so placed that the lower ends of the boiler-sections rest upon it, as plainly shown. This plate-ring in practice is suitably sustained upon or by whatever form of base may be applied to the boiler. No base being shown in the drawings, the darts, Fig. 1, are employed to indicate the direction of the sustaining force.

It will be observed that the lower header is located below the firesurface and independent of the supporting-ring, and that the arrangement is such -that all the sections are separately readily accessible for removal or adj ustment, and that the various parts above and below the supporting-ring are free to expand or contract without disturbing each other.

The gratebars d are sustained by the gratering J, and the latter by the lower header, as above explained. The grate-ring may be easily detached and removed at any time.

XVe are awarethat east-iron sectional boilers containing hollow projections similar to those shown in Figs. 1 and 2 have been used prior to our invention, and are shown in patent granted to John F. Daniels, September 7, 1875, No. 167,438. \Ve do not, therefore, claim such construction, broadly; but

hat we do claim as new herein,and desire to secure by Letters Patent, is

1. In a sectional eastiron boiler, the combination of the vertical hollow sections arranged in circular or oval form, said sections being connected at top and bottom with circulating pipes or headers, the top header admitting and sustaining the fucl-magazine,and the whole supported from points in or on the lower ends of the sections and independent of 35 JOHN HOPSON, JR. LEW'IS S. DANIELS.

\Vitnesses:

\VI LLIA )1 BE LOH E a, JonN MoRRIssnY. 

